GOGO Hound Life Jacket, Dog Saver Life Vest A note about sizing: All pups are unique and special, especially yours! Sizing guidelines may differ dog to dog. Please choose your size after taking every measurement listed on the chart. And take any other unique traits (large shoulders, long torso, etc.) into consideration. Kindly suggest you to order one size larger than your measurement. Reflective accents and bright colors for high visibility. Fully adjustable chest and neck straps, and quick release buckles. Mesh holes provide superior ventilation. Convenient top grab handles allow easy rescue by hand or boat hook. Heavy-duty yet more comfortable hook-and-loop fastening system around the belly and neck to keep securely fastened.